Valve



Sept. 18 1923.

C. R. C. BORDEN VALVE /6' Original Filed JulyAl'. 1916 3 2 wl Y 0H 3 y@ 0 3&2 50047 JT/MM 1 mm Q f 5 .A

VV/TA/:s ses 7 THA aus C BORME/v `acture. drawings like reference numerals are cor- CHARLES B. C. BOBEN, OF `BBOQKILINIE, -NASSACHUSETTS VALVE.:

v Application filed July 17, 1916, Serial No. 109,777. 'Renewed August 12,- 1919. Serial No; 317,084.

'o all whom z't may concern l ,Be'it known that/I, CHARLES' R. C. BonnnN, a citizen of the United States, residinglat Brookline, county of Norfolk, Com` monwealth of'Massachusetts', have invented certain new and useful improvements in Valves; of which thefollowing is a specifica- '.VA I A This invention relates lto valves, and particularlyt'o a valvefor controlling the inflationof a pneumatic tube such as the inn'er tube of an'automobile or bicycle tire or the air bag used in connection with the manufacture of such tires.

lhe object of my invention, generally 's`tated,'is 'to 'provide a valve of this class tvhichwill adord a more perfect control of the pressure,l particularly as regards leakage.:l 'With the' ordinary tire valve, the tendency' of the pressure is to leak past the screw threaded connection between the valve spin'- d'le and stern when the usual needle valve on said spindle is unseated to permit initiation of the tube. My invention contemplates the provision of an air-tight seal above the nee# die valve to prevent escape of this pressure past the'screw threads.

ln its'simplest form, this seal may be effected by reducing the valve spindle above the screw threads to provide an annular groove' terminating in a tapered shoulder and by 'turning in the upper end oi the stem to enter said groove and abut the tapered shoul-A der when the spindle is retracted to unseat the needle valve. ylhis provides an outw'ardly opening retaining valve at the outer end of the spindle which closes to seal the screw threads when the needle valve at the lower end of the spindle is opened to per- 4mit inflation of the tube.v v

The' construction and operation of my device-will be more'ully disclosed in the speci.-

'ic'ation that follows: ln the drawings :torm- 'ing a part of that specilicaticn l have shown jas an illustrativeembodiment a form of valve f vvli'ichv has been found satisfactory in use and welladapted to the' requirements of manu- Throughout specification and respondingly applied, andv in these dra-wg 'ingst'f Fig. '1 is a central vertical section though a valve in accordance with my invention applied to the inner tube of an automobile tire.

Fig. 2 is an enlarged detail of the upperv portion of the valve stem`and associated parts, and j Figs. 3, land 5 are transverse sectlons on steu to be entered through the stem opening se of the inner tube. The stem terminates at this end in a dat base 27 which clamps the stem against the internal face'ot the tube l. fihestein is clamped against the external tace of the tube by a vWasher 28 looseon the fm stern. The Washer iscompressed against the tube by a pair of faced-od loclr nuts 28 and asuperimposed knurled lock nut 29 threaded on t e stem'.

` The upper end of the stem' 2 has an eni5 larged bore 7 connecting with the interior of the tire tube l by'a longitudinal air passage 26. rilhe bore 7 is threaded internally at d for the greater part of its length to receive the external threads 6 on the spindle 5 of @I needle valve adjustable in said bore. Where used as a tire valve, the threads 6 are cut away at one side of the spindle as indicated at 8, Fig. d, for substantially the length fof the spindle Ato provide an exteri'iall long- @5 tudinally disposed air passage through which the air in'the tire may pass when it is desired to quickly deate Athe tire.

The spindle is reduced adjacent to the upper end of the stern 2 as indicated at 5. W

ylhis provides a groove encirclng the spindle and of suicient breadth to permit opening and closing of the valve. The groove terminates at its lower edge in 'a tapered shoul der 5B. The upper end of the stem is in- 95 turned as indicated at 3 to enter said groove and abut said tapered shoulder 5a when -the s indle is retracted. This" prevents comp ete withdrawal of the spindle.

The spindle 5 is knurled as at 9 externally to facilitate rotation. The -upper open end ofthe spindle 5 is internally threaded at 10 to receive the check valve'which consists of a seat member threaded 'at ll'andj extended up to form a connectin -nipple' 18y belovi1 a@ which is afac'ed od ortica-for engagement by a wrench: Within the open end of the needle valve stem 5 is set a packing disc 19 :which is compressed against the seat in the lower end of the stein` by the lower end of conical en the check valve seat 12. The disc 19 -is eccentrically perforated as indicated at 20, Fig. 3. The tapered check valve 15 is adapted to ind its seat at 14: and seal the air passage 17 when the tire is inliated and hold the back ressure. The valve 15 normally rests on t e' disc 19 with its pin or stem 16 fitting' the air passage 17, but never seals the eccentric perforations 20.

The perforations 2O of the disc 19 with the longitudinal air passage 21 and the intersecting transverse air passage 22 of the needle valve 5 and the longitudinal passage' 26 of the stem 2 put the valve chamber 13 into ,communication with theV inner tube 1 when the needle valve is unseated. The passage 22 is formed in the lower reduced end 23 ot the spindle 5 and connects at each end with the lower end of the bore 7. Below this passa e 22 the spindle terminates in a d 24 ada ted to find its seat'on an outwardly bevell shoulder 25 which con stitutes a liared inlet for the passage V.26 of the stem 2. The conical end 2a is normally adapted to close the passage 26 and prevent escape of the pressure contained in the tire.

In use whenit is desired to iniiate the tire, the pump connection is made with the end 18 of the valve seat. rlhe needle valve 5 is then screwed up by turning the sleeve 9 a limited distance to unseat the conical end 2li and open up the passage 26. This movement of the spindle brings the tapered shoulder 5a at the lower edge of the groove 5 against the inturned portion 3 of the stem 2, so as to eiect a substantially air tight seal at the outer end of spindle above the screw threads 6 to prevent leakage of the pressure past said threads. rEhe shoulder 5a and inturned portion 3 thus constitute an outwardly opening valve at the upper end of the stem, the position of which is controlled according to the osition of the needle valve 2a with relation to its seat 25. Where the spindle is provided with the longitudinal by-pass 8, said outwardly opening valve 5, 3 seals said passage when the spindle is rotated to unseat the needle valve.

Air under pressure is now forced into the passage 17 from the pump, past the check valve, through the eccentric perforations 20 which are always' uncovered by the check valve, and through the passages 21, 22 and 26 to the tire. As soon as sufficient air enters the tire tocreate a back pressure this pressure will seat the light check valve against its seat 14 on each suction stroke of the pump piston, the valve falling back on to the disc 19 on each compression stroke of the piston to permit the air to pass through the passage 17 into the chamber 13 and thence to the tube 1. The check valve 15 therefore e'ectively holds the back pressure on each stroke of the pump piston. When the desired pressure in the tire is reached2 the Maaate needle valve is screwed down so that its tapered end 24 inds its seat 25, thus permanently sealing the passage 26. The pump connections are then removed. With the tire thus inflated the pressure from the tire is carried by the pointed end of the needle valve, thereby removing a strain from the light check valve 14.

When it is desired to renew the check valve 15 the change may be made without losing the pressure of the tire by removing the valve and seat from the open end of the needle valve stem and substituting a new valve and seat which may be furnishedlin accordance with theusual practice. y

When it is desired to deiiate the tire, the needle valve is unscrewed sutliciently far to uncover the passage 26 but not enough to bring the tapered shoulder of the groove 5 against the int-urned end of the stem 2. The air from the tire escapes through' the by-pass 8 of which there may obviously be more than one, and through the passage 21 past the check valve.

Various modifications may obviously be made in the orm of the check valve and in the use and construction of the needle valve, all without departing from the spirit of my invention it within the limits of the appended claims.

"Whaty l therefore claim and desire to secure by Letters Patent is 1. A valve comprising a hollow stem hav'- ing an inturned portion near one end adapted to provide a seat for a. spindle, a longitudinally bored spindle adjustable in said stem, a valve on Said spindle adapted to control the passage of air through said stem, said spindle havin an annular reduced por'- tion of suiicient ength vto permit opening and closing of said valve and said spindle below said reduced portion being formed as a valve for cooperation with the seat provided by the inturned portion of said stem, there being a longitudinal deflating pas sage between said spindle and stem 'sealed when the spindle is adjusted to seat against the seat provided by said inturned portion of the Stem.

2. An inflation valve comprising a stem having a longitudinal bore', a seat withinl said bore, a spindle having a passage for air and adjustably mounted within said bore, an inwardly opening check valve in said passage, a valve on said spindle and adapted to find said seat, a longitudinal vent along said spindle, said spindle having an annular groove 'about it adjacent to the end of said valve stem, said groove terminating at its lower edge in a tapered shoulder and the end of said valve stembeing inturned to enter said groove and to abut said tapered' shoulder when said spindle is'lre'- tracted. y

q 3. A valve for use with tires or the like.,

isc

remera comprising a hollow stem having a seat for a valve near its inner end and having its outer end formed as a seaiing element a spindle adjustable in said stem and having a portion formed for cooperation -with said sealing end, a valve on the inner end of said spindle ada ted to cooperate with said seat to control t e passa e of air through said stem and the spind e havin an inflating ,l passage-connecting with the interior of the tire or the like when the spindle is adjusted to unseat the valve there being a deating passage between the spindle and stem connecting with the interior of the tire or the like when said valve is unseated but sealed against loss of pressure by the cooperation of the co-acting portion of the spindle with the outer end of`r the stem.

4." A valve comprising a hollow stem member, a spindle adjustably mounted therein, and having a longitudinal passage for the vent pressure, a valvev on said spindle controlling the passage of pressure through the stem, said spindle having a reduced portion of a len h sulicient to permit the opening and c osing of said valve and itself constituting a valve for said vent passage, and said stem having a portion turned into said reduced portion.

In testimony whereof l ailix my si ature.

CHARLES R. C. BUR EN. 

